{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:AIUGLAJQLWAG4UH36HATUQYOYH","short_pith_number":"pith:AIUGLAJQ","canonical_record":{"source":{"id":"1802.05625","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-15T15:44:30Z","cross_cats_sorted":[],"title_canon_sha256":"5f19c3d016c6dc227f88ce77154daf459cf34694dd145404d24210fbdf4acfb0","abstract_canon_sha256":"549e90829af62809fe9ed595810cd4f48e0272796b9057cdd2e736026c1e6d87"},"schema_version":"1.0"},"canonical_sha256":"02286581305d806e50fbf1c13a430ec1d391f2fc64d9fd8a3e849d8256eb6544","source":{"kind":"arxiv","id":"1802.05625","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.05625","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"arxiv_version","alias_value":"1802.05625v1","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.05625","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"pith_short_12","alias_value":"AIUGLAJQLWAG","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AIUGLAJQLWAG4UH3","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AIUGLAJQ","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:AIUGLAJQLWAG4UH36HATUQYOYH","target":"record","payload":{"canonical_record":{"source":{"id":"1802.05625","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-15T15:44:30Z","cross_cats_sorted":[],"title_canon_sha256":"5f19c3d016c6dc227f88ce77154daf459cf34694dd145404d24210fbdf4acfb0","abstract_canon_sha256":"549e90829af62809fe9ed595810cd4f48e0272796b9057cdd2e736026c1e6d87"},"schema_version":"1.0"},"canonical_sha256":"02286581305d806e50fbf1c13a430ec1d391f2fc64d9fd8a3e849d8256eb6544","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:05.988800Z","signature_b64":"WqJO8/Z4Fg9BwR2Z3zkumUNGBrAFAHIKj3kjvfYIEAffdeCZVVK6HO8/khDP8EKhz3MKqFL8+R3CvUx/sbcYCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"02286581305d806e50fbf1c13a430ec1d391f2fc64d9fd8a3e849d8256eb6544","last_reissued_at":"2026-05-18T00:21:05.988295Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:05.988295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.05625","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:21:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z3ArWyHk+9BBmA8UQ9ZKgoyf/VwtbV27sMVFKooP5w+ZmxxfJ+f/282/W0oJ3FlKwsDBj0qi9Mrn2qcZfgvKDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:24:43.500145Z"},"content_sha256":"f4f74869dd636273921ad55580d3cf681dee46a12d282fe3dfdf5a4f4052b03f","schema_version":"1.0","event_id":"sha256:f4f74869dd636273921ad55580d3cf681dee46a12d282fe3dfdf5a4f4052b03f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:AIUGLAJQLWAG4UH36HATUQYOYH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Alone on a wide wide sea. The origin of SECCO 1, an isolated star-forming gas cloud in the Virgo cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"F. Calura, F. Fraternali, G. Battaglia, G.Beccari, G. Cresci, L. Armillotta, L. Coccato, L. Magrini, M. Bellazzini, M. Correnti, N.F. Martin, P.T. de Zeeuw, R. Ibata, S. Perina, V. Testa","submitted_at":"2018-02-15T15:44:30Z","abstract_excerpt":"SECCO1 is an extremely dark, low-mass (M_star=10^5 M_sun), star-forming stellar system lying in the Low Velocity Cloud (LVC) substructure of the Virgo cluster of galaxies, and hosting several HII regions. Here we review our knowledge of this remarkable system, and present the results of (a) additional analysis of our panoramic spectroscopic observations with MUSE, (b) the combined analysis of Hubble Space Telescope and MUSE data, and (c) new narrow-band observations obtained with OSIRIS@GTC to search for additional HII regions in the surroundings of the system. We provide new evidence supporti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.05625","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:21:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gJHhMgoM8JmRlJBHaWsakxI8vw1FqQpVswW2qCiXX/mwyaQm/jMacY6K2VmKtxp7fodLMDNl7nizYyptIs67Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:24:43.500764Z"},"content_sha256":"df77406c405a10efbc56b150eb7a7ed9f39392e8f16fe8b0b946fbec47087080","schema_version":"1.0","event_id":"sha256:df77406c405a10efbc56b150eb7a7ed9f39392e8f16fe8b0b946fbec47087080"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AIUGLAJQLWAG4UH36HATUQYOYH/bundle.json","state_url":"https://pith.science/pith/AIUGLAJQLWAG4UH36HATUQYOYH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AIUGLAJQLWAG4UH36HATUQYOYH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T12:24:43Z","links":{"resolver":"https://pith.science/pith/AIUGLAJQLWAG4UH36HATUQYOYH","bundle":"https://pith.science/pith/AIUGLAJQLWAG4UH36HATUQYOYH/bundle.json","state":"https://pith.science/pith/AIUGLAJQLWAG4UH36HATUQYOYH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AIUGLAJQLWAG4UH36HATUQYOYH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AIUGLAJQLWAG4UH36HATUQYOYH","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"549e90829af62809fe9ed595810cd4f48e0272796b9057cdd2e736026c1e6d87","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-15T15:44:30Z","title_canon_sha256":"5f19c3d016c6dc227f88ce77154daf459cf34694dd145404d24210fbdf4acfb0"},"schema_version":"1.0","source":{"id":"1802.05625","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.05625","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"arxiv_version","alias_value":"1802.05625v1","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.05625","created_at":"2026-05-18T00:21:05Z"},{"alias_kind":"pith_short_12","alias_value":"AIUGLAJQLWAG","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AIUGLAJQLWAG4UH3","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AIUGLAJQ","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:df77406c405a10efbc56b150eb7a7ed9f39392e8f16fe8b0b946fbec47087080","target":"graph","created_at":"2026-05-18T00:21:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"SECCO1 is an extremely dark, low-mass (M_star=10^5 M_sun), star-forming stellar system lying in the Low Velocity Cloud (LVC) substructure of the Virgo cluster of galaxies, and hosting several HII regions. Here we review our knowledge of this remarkable system, and present the results of (a) additional analysis of our panoramic spectroscopic observations with MUSE, (b) the combined analysis of Hubble Space Telescope and MUSE data, and (c) new narrow-band observations obtained with OSIRIS@GTC to search for additional HII regions in the surroundings of the system. We provide new evidence supporti","authors_text":"F. Calura, F. Fraternali, G. Battaglia, G.Beccari, G. Cresci, L. Armillotta, L. Coccato, L. Magrini, M. Bellazzini, M. Correnti, N.F. Martin, P.T. de Zeeuw, R. Ibata, S. Perina, V. Testa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-15T15:44:30Z","title":"Alone on a wide wide sea. The origin of SECCO 1, an isolated star-forming gas cloud in the Virgo cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.05625","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f4f74869dd636273921ad55580d3cf681dee46a12d282fe3dfdf5a4f4052b03f","target":"record","created_at":"2026-05-18T00:21:05Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"549e90829af62809fe9ed595810cd4f48e0272796b9057cdd2e736026c1e6d87","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-02-15T15:44:30Z","title_canon_sha256":"5f19c3d016c6dc227f88ce77154daf459cf34694dd145404d24210fbdf4acfb0"},"schema_version":"1.0","source":{"id":"1802.05625","kind":"arxiv","version":1}},"canonical_sha256":"02286581305d806e50fbf1c13a430ec1d391f2fc64d9fd8a3e849d8256eb6544","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02286581305d806e50fbf1c13a430ec1d391f2fc64d9fd8a3e849d8256eb6544","first_computed_at":"2026-05-18T00:21:05.988295Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:05.988295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WqJO8/Z4Fg9BwR2Z3zkumUNGBrAFAHIKj3kjvfYIEAffdeCZVVK6HO8/khDP8EKhz3MKqFL8+R3CvUx/sbcYCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:05.988800Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.05625","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f4f74869dd636273921ad55580d3cf681dee46a12d282fe3dfdf5a4f4052b03f","sha256:df77406c405a10efbc56b150eb7a7ed9f39392e8f16fe8b0b946fbec47087080"],"state_sha256":"419566d3e45779939da39ad148141d451addbc082fe73862f2c0252357654e29"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dOJ/2N4PS5RprOTKKjbN5lpErmD3VtyesDGXisfnymM+4sZWTWOX/fBPbLEJYE4Kq4NcTuhraygc67wvXzdJCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T12:24:43.503968Z","bundle_sha256":"45e9c6f869425b3ec20e1822cbf67ef547ab6d08079e6ce9cd6c85091c85205e"}}